A method for manufacturing a three-dimensional shaped object includes: a stacking step of stacking a layer by discharging a shaping material from a nozzle while moving the nozzle with respect to a stage in accordance with shaping data with which a three-dimensional shaped object is shaped, the shaping data including path information indicating a movement path of the nozzle with respect to the stage and discharge amount information indicating a discharge amount of the shaping material in the movement path; and a data changing step of adding a cleaning command for cleaning the nozzle to the shaping data based on information included in the shaping data.

A method of designing and forming a piezoelectric ceramic crystal integrating an impedance matching region and a backing region. The method includes receiving one or more required operating parameters of the piezoelectric ceramic crystal for an application, iteratively modeling and simulating performance of one or more materials, structures, and gradients to utilize within the piezoelectric ceramic crystal, identifying at least one material, structure, or gradient that exhibits predicted performance that at least substantially achieves the one or more required operating parameters of the piezoelectric ceramic crystal, outputting a design of the piezoelectric ceramic crystal, and forming the piezoelectric ceramic crystal via one or more additive manufacturing processes.

An interlayer pre-cooling apparatus for a sand mold freezing printing includes a sand paving apparatus. The sand paving apparatus is located above a negative-pressure low-temperature forming chamber, and the sand paving apparatus includes several independent sand paving grooves, a hollow sand paving roller, a cooling chamber, a sand scraping plate, and an openable and closable baffle. The openable and closable baffle is rotationally arranged at a discharge port of each sand paving apparatus, and the openable and closable baffle is used for paving low temperature premixed sand on demand. The premixed molding sand is further cooled during the process of scraping and compacting low-temperature molding sand. When the apparatus is adopted for sand mold freezing 3D printing, the low temperature of the premixed molding sand is precisely controllable, which has great significance for realizing interlayer pre-cooling of the sand mold freezing printing.

A galactic extrusion manufacturing (GEM) system for performing an extrusion process includes an extruder assembly for extruding building material during the extrusion process, and a connection system including a robotic arm-tether-crimper for attachment of the GEM system to space bound vehicles and/or structures in space or on orbit. The extrusion assembly includes an extruder head outfitted with multiple different heads for shaping the building material during the extrusion process, at least one power cartridge, and at least one building material cartridge containing the building material, wherein the power cartridge and the building material cartridge are removable and replaceable. Also provided are a building material cartridge for use with a GEM system or a dispensing control unit (DCU) to perform an extrusion process, and a smart extrusion system including a building material cartridge and a DCU.

A system for forming a product with different size particles is disclosed. The system comprises at least one print head region configured to retain a first group of print heads configurable to additively print at least a first portion of the product with a first material and a second group of print heads configurable to additively print at least a second portion of the product with a second material. The described system may also comprise a processor configured to regulate the first group of print heads and the second group of print heads to distribute the first material and the second material. A method of making an object by ink jet printing using the disclosed system is also disclosed.

The present disclosure relates to compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of preparing compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of using the bone compositions, bone implants and variants thereof.

A method for injecting a loaded suspension into a fibrous texture having a three-dimensional or multilayer weaving includes the injection of a suspension containing a powder of solid particles into the volume of the fibrous texture. The injection of the loaded suspension is carried out by at least one hollow needle in communication with a loaded suspension supply device, each needle being movable in at least one direction extending between a first face and a second opposite face of the fibrous texture so as to inject the loaded suspension at one or more determined depths in the fibrous texture.

A three-dimensional shaped article production method for producing a three-dimensional shaped article by stacking layers to form a stacked body includes a first layer formation step of forming a first layer on a support by supplying a first composition containing first particles and a binder, a second layer formation step of forming a second layer composed of one layer or a plurality of layers on the first layer by supplying a second composition containing second particles and a binder, and a separation step of separating the second layer from the support through the first layer, wherein after the separation step, a sintering step of sintering the second layer is performed.

A three-dimensional shaping device includes: a discharge unit having a nozzle and configured to discharge a material toward a stage; a cleaning mechanism configured to clean the nozzle; and a moving unit configured to move the discharge unit and the cleaning mechanism relative to the stage. The moving unit is configured to move the cleaning mechanism relative to the stage in conjunction with the movement of the discharge unit relative to the stage.

A powder spreading apparatus includes a hopper having a first end, a second end opposite from the first end, a front wall, a rear wall opposite from the front wall, and a floor. The front wall, the rear wall, the first end, the second end, and the floor define an interior. An impeller is disposed within the interior of the hopper. The impeller includes a plurality of circumferentially spaced flutes and is configured to rotate about an impeller axis that extends from the first end of the hopper to the second end of the hopper to deposit powder onto a print area. A spreader rod is coupled to the hopper and extends along a spreader rod axis parallel to the impeller axis. The spreader rod is configured to rotate about the spreader rod axis to smooth the powder as it is deposited onto the print area. A powder spreading method is disclosed that operates an impeller to start depositing powder from a hopper into a print area located within a build box as a gantry moves the hopper in a first direction across the print area; operating a spreader rod to smooth out the powder on the print area as the gantry moves the hopper and the spreader rod across the print area in the first direction; and upon the gantry reaching a predetermined position in the print area, stopping the impeller to stop depositing the powder while continuing to operate the spreader rod.